Disclosed is a building frame heat storage structure which has a high heat exchange efficiency and can efficiently store heat in a building frame. The building frame heat storage structure has a metallic heat exchange member (22) which is secured to a building frame concrete (20) and which performs a heat exchange for cooling and heating within a building, and a radiation panel (12) which is directly or indirectly secured to the building frame concrete (20) and which faces toward the inside of the building to emit radiation heat. The building frame heat storage structure is provided with heat exchange pipes (16) composed of resin, which are attached to at least either the heat exchange member (22) or the radiation panel (12) and which allow a heat exchange medium for heat exchange to pass therethrough. Heat energy generated from the heat exchange medium is stored in the building frame concrete (20) via the heat exchange pipes (16) due to the radiation of the heat energy. Metallic retaining members (14) which retain the heat exchange pipes (16) are provided on the backside surface of the radiation panel (12).